The wars too brought a steadily increasing population of slaves to the city, many of whom in course of time would be manumitted, would marry, and so increase the free population.

These are only a few of the many causes at work after the Punic wars which crammed together in the site of Rome a population which, in the latter part of the last century B.C., probably reached half a million or even more.[16] Let us now descend from the Janiculum, and try to imagine ourselves in the Rome of Cicero's time, say in the last year of the Republic, 50 B.C., as we walk through the busy haunts of this crowded population.
We will not delay on the right bank of the Tiber, which had probably long been the home of tradesmen in their gilds,[17] and where farther down the rich were buying land for gardens[18] and suburban villas; but cross by the Pons Aemilius, with the Tiber island on our left, and the opening of the Cloaca maxima, which drained the water from the Forum, facing us, as it still does, a little to our right.

We find ourselves close to the Forum Boarium, an open cattle-market, with shops (tabernae) all around it, as we know from Livy's record of a fire here, which burnt many of these shops and much valuable merchandise.[19] Here by the river was in fact the market in the modern sense of the word; the Forum Romanum, which we are making for, was now the centre of political and judicial business, and of social life.
We might go direct to the great Forum, up the Velabrum, or valley (once a marsh), right in front of us between the Capitol on the left and the Palatine on the right.

But as we look in the latter direction, we are attracted by a long low erection almost filling the space between the Palatine and the Aventine, and turning in that direction we find ourselves at the lower end of the Circus Maximus, which as yet is the chief place of amusement of the Roman people.

Two famous shrines, one at each end of it, remind us that we are on historic ground.